Abstract：The construction methods are complex and changeable，which influence the performances of soil around the site. For a long time the excavating theory and stability analysis of deep excavation are based on the original soil. In this paper，on the basis of the previous researches，the concept of construction disturbance is discussed，and an expression of disturbance degree is set up and the calculation model against heave for the stability of deep excavation is established. In additional，the calculation example is also given. The study shows the construction disturbance can exert an obvious effect on the safety factor. And some engineering measures to control the construction disturbance are taken.
